Combined suppression effects on hydrodynamic cavitation performance in Venturi-type reactor for process...

Area of Science:

• Fluid Dynamics
• Chemical Engineering
• Water Treatment Technologies

Background:

• Hydrodynamic cavitation is an emerging intensification technology.
• Venturi-type cavitation reactors offer advantages for industrial applications.

Purpose of the Study:

• Investigate the effects of temperature on hydrodynamic cavitating flows.
• Determine optimal reaction conditions to enhance cavitation treatment intensity.

Main Methods:

• Analyzed cavitation performance influenced by cavitation number (σ), Reynolds number (Re), and thermodynamic parameter (Σ).
• Observed changes in cavitation length, intensity, and unsteady behavior with varying temperatures.
• Introduced a combined suppression parameter (CSP) to predict cavitation intensity.

Main Results:

• Cavitation intensity peaks at a transition temperature of 58°C.
• Increasing temperature initially increases then decreases cavitation length.
• Cavity-shedding regimes transition from attached sheet to periodic cloud cavities as cavitation extent grows.

Conclusions:

• Temperature significantly influences cavitation intensity and unsteady behavior.
• Optimal intensification of cavitation processes is achieved in the low-CSP range (55-60°C).
• Findings provide critical insights for optimizing industrial-scale cavitation reactors.